Snow Buries the U.S. Interior and East

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January 26, 2026

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A potent winter storm left a wide band of snow stretching from the U.S. Southwest to New England in late January 2026. The heavy snow, along with bitterly cold temperatures, sleet, and ice, created treacherous travel conditions, toppled power lines, and caused widespread school closures, according to news reports.

On the afternoon of January 26, the VIIRS (Visible Infrared Imaging Radiometer Suite) on the Suomi NPP satellite observed new snow covering a large swath of the country. The left image is natural color, while the false-color image on the right uses a combination of visible and infrared light (bands M11-I2-I1) to distinguish snow (blue) from clouds (white).

Preliminary National Weather Service data indicate snow accumulations of up to 12 inches (30 centimeters) in parts of Oklahoma between the mornings of January 23 and January 26, with higher accumulation across the Midwest and in New England. Totals of around 20 inches were reported in several Northeast states.

Some locations were digging out from record daily accumulations, including 5.1 inches in St. Louis, Missouri, on January 24, and 11.2 inches in Pittsburgh, Pennsylvania, on January 25. Several inches of snow and sleet also fell in parts of North Texas, a rare occurrence for the area. With temperatures remaining below freezing in many places, the snow and ice may stick around.

NASA’s Disasters Response Coordination System has been activated to support federal partners responding to the winter storm. The team will be posting maps and data products on its open-access mapping portal as new information becomes available.

NASA Earth Observatory images by Lauren Dauphin using VIIRS data from NASA EOSDIS LANCE, GIBS/Worldview, the Suomi National Polar-orbiting Partnership. Story by Lindsey Doermann.

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References & Resources

• CBS News (2026, January 27) Power out for hundreds of thousands, roadways snarled with ice and snow after deadly storm. Accessed January 27, 2026.
• NASA (2026) US Winter Storm January 2026. Accessed January 27, 2026.
• NWS National Operational Hydrologic Remote Sensing Center (2026, January) National Gridded Snowfall Analysis. Accessed January 27, 2026.
• NWS Weather Prediction Center (2026, January 26) Storm Summary Message. Accessed January 27, 2026.
• The Washington Post (2026, January 27) See how much snow fell — and where it broke records. Accessed January 27, 2026.

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NASA Testing Advances Space Nuclear Propulsion Capabilities

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NASA Testing Advances Space Nuclear Propulsion Capabilities

Written by Daniel Boyette

Nuclear propulsion and power technologies could unlock new frontiers in missions to the Moon, Mars, and beyond. NASA has reached an important milestone advancing nuclear propulsion that could benefit future deep space missions by completing a cold-flow test campaign of the first flight reactor engineering development unit since the 1960s.

“Nuclear propulsion has multiple benefits including speed and endurance that could enable complex deep space missions,” said Greg Stover acting associate administrator of NASA’s Space Technology Mission Directorate at NASA Headquarters in Washington. “By shortening travel times and expanding mission capabilities, this technology will lay the foundation to explore farther into our solar system than ever before. Information from the cold-flow test series is instrumental in understanding the operational characteristics and fluid flow performance of nuclear reactors.”

Teams at the agency’s Marshall Space Flight Center in Huntsville, Alabama, conducted more than 100 tests on  the engineering development unit over several months in 2025. The 44-inch by 72-inch unit, built by BWX Technologies of Richmond, Virginia, is a full-scale, non-nuclear, flight-like development test article the size of a 100-gallon drum that simulates propellant flow throughout the reactor across a range of operational conditions.

The cold-flow tests at NASA Marshall are the culmination of a multi-year activity for the agency and its industry partners. Key test objectives included simulating operational fluid-dynamic responses, gathering critical information for design of the flight instrumentation and control system, providing crucial validation of analytical tools, and serving as a pathfinder for manufacturing, assembly, and integration of near-term flight-capable nuclear propulsion systems.

Other benefits to space travel include increasing the science payload capacity and higher power for instrumentation and communication.

Test engineers were able to demonstrate that the reactor design is not susceptible to destructive flow-induced oscillations, vibrations or pressure waves that occur when a moving fluid interacts with a structure in a way that makes the system shake.

“We’re doing more than proving a new technology,” said Jason Turpin, manager of the Space Nuclear Propulsion Office at NASA Marshall. “This test series generated some of the most detailed flow responses for a flight-like space reactor design in more than 50 years and is a key steppingstone toward developing a flight-capable system. Each milestone brings us closer to expanding what’s possible for the future of human spaceflight, exploration, and science.”

The Space Nuclear Propulsion Office is part of NASA’s Technology Demonstration Missions Program within the agency’s Space Technology Mission Directorate.

Learn more about NASA’s technology advancements:

https://www.nasa.gov/space-technology-mission-directorate/

News Media Contact

Joel Wallace
Marshall Space Flight Center, Huntsville, Alabama
256-544-0034
joel.w.wallace@nasa.gov

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Discovery Alert: An Ice-Cold Earth?

The Discovery

A candidate planet that might be remarkably similar to Earth, HD 137010 b, has one potentially big difference: It could be colder than perpetually frozen Mars.

Key Facts

Scientists continue to mine data gathered by NASA’s Kepler Space Telescope, retired in 2018, and continue to turn up surprises. A new paper reveals the latest: a possible rocky planet slightly larger than Earth, orbiting a Sun-like star about 146 light-years away.

The orbital period of the planet — listed as a “candidate” pending further confirmation — is likely to be similar to Earth’s, around one year. Planet HD 137010 b also might fall just within the outer edge of its star’s “habitable zone,” the orbital distance that could allow liquid water to form on the planet’s surface under a suitable atmosphere.

Planets orbiting other stars are known as “exoplanets.” And this could turn out to be the first exoplanet with Earth-like properties that, from our vantage point, crosses the face of a Sun-like star that is near enough and bright enough for meaningful follow-up observations.

Details

Now the bad news. The amount of heat and light such a planet would receive from its star is less than a third of what Earth receives from the Sun. Although of a stellar type similar to our Sun, the star, HD 137010, is cooler and dimmer. That could mean a planetary surface temperature no higher than minus 90 degrees Fahrenheit (minus 68 degrees Celsius). By comparison, the average surface temperature on Mars runs about minus 85 degrees Fahrenheit (minus 65 degrees Celsius).

Planet HD 137010 b also will need follow-up observations to be promoted from “candidate” to “confirmed.” Exoplanet scientists use a variety of techniques to identify planets, and this discovery comes from a single “transit” — only one instance of the planet crossing its star’s face in a kind of miniature eclipse — detected during Kepler’s second mission, known as K2. Even with just one transit, the study’s authors were able to estimate the candidate planet’s orbital period. They tracked the time it took for the planet’s shadow to move across the star’s face — in this case 10 hours, while Earth takes about 13 — then compared it to orbital models of the system itself. Still, though the precision of that single detection is much higher than most transits captured by space-based telescopes, astronomers need to see these transits repeat regularly in order to confirm that they are caused by a real planet.

And capturing more transits is going to be tricky. The planet’s orbital distance, so similar to Earth’s, means such transits happen far less often than for planets in tighter orbits around their stars (it’s a big reason why exoplanets with Earth-like orbits are so hard to detect in the first place). With luck, confirmation could come from further observation by the successor to Kepler/K2, NASA’s TESS (the Transiting Exoplanet Survey Satellite), the still-functioning workhorse for planetary detection, or from the European Space Agency’s CHEOPS (CHaracterising ExOPlanets Satellite). Otherwise, gathering further data on planet HD 137010 b might have to wait for the next generation of space telescopes.

Fun Facts

Despite the possibility of a frigid climate, HD 137010 b also could turn out to be a temperate or even a watery world, say the authors of the paper on this exoplanet. It would just need an atmosphere richer in carbon dioxide than our own. The science team, based on modeling of the planet’s possible atmospheres, gives it a 40% chance of falling within the “conservative” habitable zone around the star, and a 51% chance of falling within the broader “optimistic” habitable zone. On the other hand, the authors of the study say the planet has about a 50-50 chance of falling beyond the habitable zone entirely.

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An international science team published a paper on the discovery, “A Cool Earth-sized Planet Candidate Transiting a Tenth Magnitude K-dwarf From K2,” in The Astrophysical Journal Letters on Jan. 27, 2026. The team was led by astrophysics Ph.D. student Alexander Venner of the University of Southern Queensland, Toowoomba, Australia, now a postdoctoral researcher at the Max Planck Institute for Astronomy, Heidelberg, Germany.

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NASA Science Flights Venture to Improve Severe Winter Weather Warnings

A team of NASA scientists deployed on an international mission designed to better understand severe winter storms. The North American Upstream Feature-Resolving and Tropopause Uncertainty Reconnaissance Experiment, or NURTURE, is an airborne campaign that uses a suite of remote sensing instruments to collect atmospheric data on winter weather with a goal of improving the models that feed storm forecasts. This combination of instruments will also serve as a proxy to demonstrate the potential to collect similar observations from space.

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The NURTURE mission is funded by NASA’s Earth Science Division and managed by researchers at NASA Langley and NASA Ames in collaboration with the University of Oklahoma.

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Webb Data Reveals Dark Matter

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Webb Data Reveals Dark Matter

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Webb Data Reveals Dark Matter

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This image from NASA’s James Webb Space Telescope, containing nearly 800,000 galaxies, is overlaid with a map of dark matter, represented in blue. Brighter blue areas indicate a higher density of dark matter. Researchers used Webb data to find the dark matter — which is invisible — via its gravitational influence on regular matter.

The area of sky shown here is 0.54 square degrees (about 2½ times the size of the full Moon) and located in the constellation Sextans. Webb’s Near-Infrared Camera (NIRCam) peered at this region for a total of about 255 hours. 

Dark matter doesn’t emit, reflect, absorb, or even block light, and is therefore not visible to the human eye or traditional telescopes. But it does interact with the universe through gravity, and large clumps or clusters of dark matter have enough mass to curve space itself. Light traveling to Earth from distant galaxies becomes slightly distorted as it passes through the curved fabric of spacetime. In some cases, the warping is significant enough that it is apparent to the naked eye, almost as if the galaxy were being viewed through a warped windowpane, an effect called strong gravitational lensing. In the case of the dark matter map shown here, scientists inferred dark matter’s distribution by relying instead on an effect called weak gravitational lensing, which leads to much more subtle distortions of the light from thousands of galaxies.  

The dark matter in this area of sky was also mapped in 2007 using data from NASA’s Hubble Space Telescope. The Webb map contains about 10 times more galaxies than do maps of the area made by ground-based observatories and twice as many as Hubble’s map. It reveals new clumps of dark matter and captures a higher-resolution view compared to the Hubble map. 

Both the Hubble and Webb dark matter maps are part of a project called the Cosmic Evolution Survey (COSMOS). The full COSMOS “field” is 2 square degrees (about 10 times the size of the full Moon) and has been imaged by at least 15 telescopes in space and on the ground. Observing the same region with many different telescopes allows scientists to combine complementary views to understand how galaxies grow and how dark matter influences their evolution. Only Webb and Hubble data have been used to map dark matter in the region.

To refine measurements of the distance to many galaxies for the map, the team used Webb’s Mid-Infrared Instrument (MIRI), designed and managed through launch by the agency’s Jet Propulsion Laboratory, along with other space- and ground-based telescopes. The wavelengths that MIRI detects also make it adept at detecting galaxies obscured by cosmic dust clouds. 

The James Webb Space Telescope is solving mysteries in our solar system, looking beyond to distant worlds around other stars, and probing the mysterious structures and origins of our universe and our place in it. Webb is an international program led by NASA with its partners, ESA (European Space Agency) and CSA (Canadian Space Agency).

Webb’s MIRI was developed through a 50-50 partnership between NASA and ESA. A division of Caltech in Pasadena, California, JPL led the U.S. contribution to MIRI. JPL also led development of MIRI’s cryocooler, done in collaboration with Northrop Grumman in Redondo Beach, California, and NASA’s Goddard Space Flight Center in Greenbelt, Maryland.

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